An export invoice must contain the data that lets the customs authority verify the declaration in CDS: the full details of the seller and buyer along with their EORI numbers, a description of the goods that allows an HS code to be assigned, the quantity and value in the transaction currency, and the Incoterms delivery terms. Missing any of this data usually means being asked to complete the declaration.
Contents
In short — what you'll learn
- ✓ How to prepare the process and documents
- ✓ How the declaration and checks work
- ✓ How to stay compliant and keep clean records
How to prepare the process and documents
Scope of responsibility between the parties
Minimum data set for the declaration
Find the full range of UK customs clearance services.
How the declaration and checks work
An export declaration is submitted through an electronic system before the goods leave the country. This keeps the process repeatable, with all the data verifiable by the customs authority at every stage of clearance.
Operational stages from notification to release
The most common risk points and how to reduce them
The most common mistakes are: a mismatch between the value on the invoice and the customs declaration, a missing EORI number for the buyer, an incorrect CN code, or a wrong description of the goods. Any of these mistakes can result in the load being held, a declaration correction being required, or an administrative penalty being imposed. Distinguishing responsibility between the importer, the exporter and the customs representative is essential - it determines who is liable for corrections and hold-up costs.
How to stay compliant and keep clean records
Staying compliant on documentation requires regularly reviewing export invoices against current customs requirements. Correctly accounting for an export is essential to apply the 0% VAT rate, and requires holding proof that the goods left EU territory.
Record-keeping, corrections and evidence of due diligence
Export documents should be kept on file for a minimum of 5 years from the end of the year in which the transaction took place. Evidence of due diligence consists of complete documentation: the export invoice, the customs declaration, the IE599 export confirmation, and correspondence with the counterparty confirming the terms of the transaction. Corrections to customs declarations should be submitted as soon as an error is found, before the goods leave EU customs territory.
Working with a customs agency and internal audit
A customs agency can act as a direct or indirect representative - the form of representation chosen affects the scope of liability for the accuracy of the customs declaration. An internal audit of the export process should check: the completeness of the data on invoices, whether the CN codes match the description of the goods, whether declarations are submitted on time, and whether export confirmations are properly archived. Regular audits significantly reduce the risk of the tax office challenging your VAT settlements.
Summary
In summary: when it comes to 'what data must appear on an export invoice', what matters most is running the process according to current official guidance, with a clear division of responsibility and every decision documented. This approach limits delays, reduces the number of corrections and makes it easier to defend your records during an inspection. If any requirement is unclear, check the current official notice on the National Revenue Administration's website, or consult an experienced customs agency.
Legal basis and sources
- EC TAXUD: EU EORI validation
- KAS: Polish National Revenue Administration
- Ministry of Finance: Podatki.gov.pl
If regulations or system notices are updated, check the current guidance on GOV.UK or KAS before submitting a declaration.
Frequently asked questions
What data must an export invoice contain?
An export invoice must contain: full details of the seller and the buyer along with their EORI numbers, the date of issue, a unique document number, a description of the goods consistent with the customs nomenclature, the CN (HS) code, the quantity and unit of measure, the unit price and total transaction value, the payment currency, the Incoterms delivery terms, and the country of origin of the goods.
Does an export invoice need to show the buyer's EORI number?
Yes, the importer's EORI number is required to submit a customs declaration in the destination country. Missing this number can delay clearance or require a document correction. The exporter should obtain the EORI number from the counterparty before issuing the export invoice.
How long do export invoices and customs documents need to be kept?
Export invoices and the related customs documents should be kept on file for a minimum of 5 years from the end of the tax year in which the transaction took place. For exports to the United Kingdom since Brexit, UK rules (HMRC) also apply in parallel, requiring customs documents to be kept for 4 years from the date of clearance.
How is an export invoice linked to the 0% VAT rate?
Applying the 0% VAT rate to exports outside the EU is only possible once proof of export has been obtained - the IE599 document or a copy 3 SAD stamped by the customs office of export. The export invoice, together with proof of export, forms the complete evidence of due diligence required by the tax office during a tax audit.
What happens if the data on the export invoice differs from the data on the customs declaration?
A mismatch in value or in the description of the goods between the invoice and the customs declaration can result in the load being held by the customs authorities, a declaration correction being required (IE14 message), and an administrative penalty. In more serious cases the customs authority can open an investigation, which is why keeping the data consistent across all export documents is a key operational requirement.
Related guides
Have a similar case? Ask a customs agency
Describe the goods or vehicle, the route and timing. We reply on working days, usually the same day.
Something went wrong. Please try again or contact us by email or WhatsApp.